IRVINE, Calif. (KABC) -- Eyewitness News has learned a former LAPD officer has been named a suspect in the double-murder of a Cal State Fullerton basketball coach and her USC security guard fiancé in Irvine.

Keith Lawrence, 27, and Monica Quan, 28, were found fatally shot in Lawrence's car in the parking lot of their apartment complex in Irvine Sunday.

In a news conference Wednesday night, Irvine Police identified the suspect as Christopher Jordan Dorner, a former LAPD officer and Navy reservist.

Dorner's whereabouts were unknown. His last known address was on Sharon Drive in La Palma. He is believed to be driving a blue Nissan Titan pickup truck, California license plate 7X03191.